Fission: Serverless Functions for Kubernetes

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. With Fission, developers can easily create and deploy serverless functions that can be triggered by a variety of events, such as HTTP requests, messages from a message queue, or scheduled tasks.

Fission provides a simple, easy-to-use interface for developers to create serverless functions in their language of choice, without having to worry about the underlying infrastructure. The framework also offers automatic scaling, so functions can scale up or down based on demand, without any additional configuration.

Fission operates on just the code: Docker and Kubernetes are abstracted away under normal operation, though you can use both to extend Fission if you want to.

Fission is extensible to any language; the core is written in Go, and language-specific parts are isolated in something called environments (more below). Fission currently supports NodeJS, Python, Ruby, Go, PHP, Bash, and any Linux executable, with more languages coming soon.

Performance: 100msec cold start

Fission maintains a pool of "warm" containers that each contain a small dynamic loader. When a function is first called, i.e. "cold-started", a running container is chosen and the function is loaded. This pool is what makes Fission fast: cold-start latencies are typically about 100msec.

Kubernetes is the right place for Serverless

We're built on Kubernetes because we think any non-trivial app will use a combination of serverless functions and more conventional microservices, and Kubernetes is a great framework to bring these together seamlessly.

Building on Kubernetes also means that anything you do for operations on your Kubernetes cluster — such as monitoring or log aggregation — also helps with ops on your Fission deployment.

Getting Started

  # Add the stock NodeJS env to your Fission deployment
  $ fission env create --name nodejs --image ghcr.io/fission/node-env

  # Create a function with a javascript one-liner that prints "hello world"
  $ fission function create --name hello --env nodejs --code https://raw.githubusercontent.com/fission/examples/master/nodejs/hello.js

  # Run the function.  This takes about 100msec the first time.
  $ fission function test --name hello
  Hello, world!

Learn More

Understand Fission Concepts.
See the installation guide for installing and running Fission.
You can learn more about Fission and get started from Fission Docs.
To see Fission in action, check out the Fission Examples Repo.
See the troubleshooting guide for debugging your functions and Fission installation.